A.J. Burnett went ahead of CC Sabathia taking a Yankees physical, but Sabathia will reverse the pecking order in the Yankees’ starting rotation.

The Post learned Burnett underwent a physical Monday and Sabathia was at Manhattan’s Columbia Presbyterian Hospital today for tests.

The Yankees have scheduled a press conference for 1 p.m. Thursday at the old Yankee Stadium, when they will introduce both of their new pitchers.

Sabathia, who arrived in town Monday night, was waiting for his historic seven-year, $161 million deal to be finalized. Ditto Burnett, who agreed to a five-year contract worth $82.5 million. The physicals were believed to be the biggest hurdle.

Because these are the Yankees, it’s not out of the question they are not finished rebuilding a rotation that was in dire need of work. They are optimistic Andy Pettitte will take their one-year, $10 million offer, and they remain engaged with free agents Derek Lowe and Ben Sheets.

Baseball and Yankees sources claim the team is interested in free-agent sluggers Mark Teixeira and Manny Ramirez, but Teixeira has eight-year offers from the Angels and Nationals for $160 million and the Red Sox have told people they won’t be outbid for the first baseman.

If Ramirez insists on a four- or five-year deal, he likely won’t get it from the Yankees. However, if the years and price fall they will be in play.

With the work being done to finalize Sabathia and Burnett, the Mike Cameron trade that would send Melky Cabrera and Kei Igawa to the Brewers has stalled.